Stabilization of ε-CL-20 crystals by a minor interfacial doping of polydopamine-coated graphene oxide

Huang, Binbin; Xue, Zhi-Hua; Chen, Shuwen; Chen, Jiewen; Li, Xiaojiang; Xu, Kangzhen; Yan, Qi‐Long

doi:10.1016/j.apsusc.2020.145454

Cited by 42 publications

(23 citation statements)

References 22 publications

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“…While the peaks of NC located at 1658 cm −1 is corresponding to nitrated of the NO 2 asymmetric stretching, and the strong absorptions peak of 840 cm −1 corresponding to O−N stretching of NC. According to the FT‐IR spectrum of raw CL‐20 and NC/CL‐20/CnMs, it can be observed that the peaks located at 3042.6, 1564, 1386, 1284, 1181, 1042, 934, and 881 cm −1 is quite agreement with the literature review, where the peak at 1564 cm −1 is assigned to the NO 2 asymmetric stretching and the peak at 1386 cm −1 is related to the NO 2 symmetric stretching, respectively [30] . The peak at 1284 cm −1 is ascribed to the NO 2 symmetric stretching and N‐NO 2 stretching.…”

Section: Resultssupporting

confidence: 87%

“…According to the FT-IR spectrum of raw CL-20 and NC/CL-20/CnMs, it can be observed that the peaks located at 3042.6, 1564, 1386, 1284, 1181, 1042, 934, and 881 cm À 1 is quite agreement with the literature review, where the peak at 1564 cm À 1 is assigned to the NO 2 asymmetric stretching and the peak at 1386 cm À 1 is related to the NO 2 symmetric stretching, respectively. [30] The peak at 1284 cm À 1 is ascribed to the NO 2 symmetric stretching and N-NO 2 stretching. The peaks 1181 cm À 1 and 1042 cm À 1 are associated with in plane flexural vibration of CL-20 ring.…”

Section: Structure Analysismentioning

confidence: 99%

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Safe Fabrication and Characterization of NC/CL‐20/CnMs Nanoenergetic Composite Materials via Modified Sol‐Gel

et al. 2020

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In this work, nitrocellulose/hexanitrohexaazaisowurtzitane/carbon nanomaterials (NC/CL‐20/CnMs) nanoenergetic composite materials are synthesized by combining sol‐gel and vacuum freeze‐drying technology, wherein NC is chosen as the gel matrix to load CL‐20 particles and CnMs. The results indicate that the CL‐20 and CnMs are imbedded and homogeneously dispersed in the monolithic gel of NC matrix, and the polymorph of CL‐20 maintains the optimal ϵ form during the fabrication process. The thermal results reveal that the onset temperature and exothermic temperature are visibly advanced compared with physical mixing and CL‐20. In addition, the activation energy (Ea) of composites has also been calculated and exhibits lower Ea (110 kJ mol−1<) than that of raw materials (NC: 299.13 kJ mol−1, CL‐20: 157.93 kJ mol−1). Finally, the impact and frication sensitivities have been tested and present inspirational results that sensitivity is decreased greatly owning to buffer function of the monolithic gel of NC matrix. This fabrication strategy and conclusions will provide promising application for NC/CL‐20/CnMs used in propellants.

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Section: Resultssupporting

confidence: 87%

Section: Structure Analysismentioning

confidence: 99%

Safe Fabrication and Characterization of NC/CL‐20/CnMs Nanoenergetic Composite Materials via Modified Sol‐Gel

et al. 2020

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“…The authors believe that NGO may promote the heterogeneous decomposition of deprotonated HClO 4 gas on the solid surface during the high-temperature decomposition stage to reduce the temperature of HTD. Huang et al 97 succeeded in coating the surface of graphene oxide with polydopamine (GO@PDA) via the in situ coating method for the purpose of reducing the sensitivity of ε-CL-20 and improving the stability of its crystal structure. Figure 8(a) displays the structural model of the obtained composites.…”

Section: Functionalized Structurementioning

confidence: 99%

Recent advances on graphene microstructure engineering for propellant‐related applications

Liu

Zheng

Zhang³

et al. 2021

J of Applied Polymer Sci

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As a special polymeric composite and military-strategic material, composite solid propellant has attracted extensive attention and efforts to improve its performances. Graphene been regarded as an ideal material to enhance the performances of propellants, because of its excellent physical and chemical properties, such as ultra-strong strength, large specific surface area, remarkable thermal conductivity, and phenomenal electrical performance. Moreover, the microstructure engineering based on graphene has been demonstrated to reveal effective influences on the composites. Recently, many new advances have been developed in microstructure engineering of graphene for propellant-related applications. In this article, we first present an overview of the main synthesis methods of graphene. Subsequently, these new advances are reviewed, discussed, and summarized carefully. Finally, the application prospects of microstructure engineering of graphene in the propellant field are proposed.

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“…However, the facts that CL‐20 possesses crystal transformation and high sensitivity would hinder the practical use. In this case, lots of works have been focused on the reduction of its sensitivity [18–19]. It is reported that the sensitivity could be effectively reduced if insensitive TATB was coated onto CL‐20 crystal [20].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Creep Resistance and Mechanical Properties for CL‐20 and FOX‐7 based PBXs by Crystal Surface Modification

Yang

Gong

Zhang

et al. 2021

Propellants Explo Pyrotec

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Interfacial strength between energetic crystal and polymeric binder is of a great significance to the mechanical strength and other performances of polymer bonded explosives (PBXs). In this paper, hexanitrohexaazaisowurtzitane (CL‐20) and 1,1‐diamino‐2,2‐ dinitroethylene (FOX‐7) were chosen to study the thermal and mechanical properties of corresponding PBXs. The energetic crystals were firstly modified with polydopamine (PDA) and further coated with the hyperbranched polymer (HBP). The results showed that CL‐20@PDA achieved a noticeable retardation of 11 °C for the phase transition, due to the constraint of PDA shell, and the thermal decomposition of CL‐20 was slightly delayed. The storage modulus of CL‐20 based PBXs were improved. In addition, the tensile strength and compressive strength were increased by 22.9 % and 25.4 %, respectively. Concomitantly, the fracture failure temperature of FOX‐7 based PBXs composites after surface coating were increased, with its tensile and compressive strength increased by 33.1 % and 15.2 %, respectively. Moreover, the creep resistance of the two PBXs composites with surface modification was obviously enhanced.

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Stabilization of ε-CL-20 crystals by a minor interfacial doping of polydopamine-coated graphene oxide

Cited by 42 publications

References 22 publications

Safe Fabrication and Characterization of NC/CL‐20/CnMs Nanoenergetic Composite Materials via Modified Sol‐Gel

Safe Fabrication and Characterization of NC/CL‐20/CnMs Nanoenergetic Composite Materials via Modified Sol‐Gel

Recent advances on graphene microstructure engineering for propellant‐related applications

Enhanced Creep Resistance and Mechanical Properties for CL‐20 and FOX‐7 based PBXs by Crystal Surface Modification

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